<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div class="cart-body">
        <ul class="cart-list" v-for="item in cartList" :key="item.id">
          <li class="cart-list-con1">
            <input
              type="checkbox"
              name="chk_list"
              :checked="item.isChecked"
              @input="singleChange(item.skuId, $event.target.checked ? 1 : 0)"
            />
          </li>
          <li class="cart-list-con2">
            <img :src="item.imgUrl" />
            <div class="item-msg">
              {{ item.skuName }}
            </div>
          </li>
          <li class="cart-list-con3">
            <div class="item-txt">语音升级款</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ item.cartPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a
              href="javascript:void(0)"
              class="mins"
              @click="changeSkuNum(item.skuNum - 1, item.skuId)"
              >-</a
            >
            <input
              autocomplete="off"
              type="text"
              :value="item.skuNum"
              minnum="1"
              class="itxt"
              @change="changeSkuNum(+$event.target.value, item.skuId)"
            />
            <a
              href="javascript:void(0)"
              class="plus"
              @click="changeSkuNum(item.skuNum + 1, item.skuId)"
              >+</a
            >
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ item.skuNum * item.cartPrice }}</span>
          </li>
          <li class="cart-list-con7">
            <a
              @click="deleteSingle(item.skuId)"
              style="cursor: pointer"
              class="sindelet"
              >删除</a
            >
            <br />
            <a href="#none">移到收藏</a>
          </li>
        </ul>
      </div>
    </div>
    <div class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="allChecked" />
        <span>全选</span>
      </div>
      <div class="option">
        <a href="#none" @click="deleteAllCart">删除选中的商品</a>
        <a href="#none">移到我的关注</a>
        <a href="#none">清除下柜商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">
          已选择 <span>{{ totalNum }}</span
          >件商品
        </div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ allPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" @click="$router.push('/trade')">结算</a>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import { deleteCartList, reqAddCartOrUpdataCart, reqCartList,changeChecked,changeAllChecked,reqDeleteAllCart } from '@/api'
  export default {
    name: 'ShopCart',
    data(){
      return {
        cartList:[],
      }
    },
    mounted(){
      this.getShopCartList();
    },
    methods:{
      async getShopCartList(){
        const result = await reqCartList();
        this.cartList = result[0].cartInfoList;
      },
      // 2.修改商品数量
      async changeSkuNum(skuNum,skuId){
        //数量小于一就不再做操作
        if(skuNum<1)return;
        const nowSku = this.cartList.find((item)=>{
          return item.skuId === skuId;
        });
        try{
          // 发送请求，使用try catch
          await reqAddCartOrUpdataCart(skuId,skuNum-nowSku.skuNum);
          // 成功后重新请求最新的数据
          this.getShopCartList();
        }catch(e){
          alert(e.message);
        }
      },
      // 3.删除单个商品
      async deleteSingle(skuId){
        try{
          await deleteCartList(skuId);
          // 重新请求最新数据
           this.getShopCartList();
        }catch(e){
          alert(e.message)
        }
      },
      // 4.修改单个状态
        async singleChange(skuId, isChecked) {
      try {
        await changeChecked(skuId, isChecked);
        //成功则重新请求最新的数据
        this.getShopCartList();
      } catch (e) {
        alert(e.message);
        }
      },
      // 5.删除所有选中的商品，使用reduce
      async deleteAllCart() {
      try {
        const skuIdList = this.cartList.reduce((p, c) => {
          c.isChecked === 1 ? p.push(c.skuId) : "";
          return p;
        }, []);
        await reqDeleteAllCart(skuIdList);
        this.getShopCartList();
      } catch (e) {
        alert(e.message);
      }
    },

    },
    computed:{
      allPrice(){
        return this.cartList.filter((item) => item.isChecked === 1).reduce((p,c)=>p+c.cartPrice*c.skuNum,0)
      },
      totalNum(){
        return this.cartList.filter((item) => item.isChecked === 1).reduce((p,c)=>p+c.skuNum,0);
      },
       allChecked: {
      get() {
        return this.cartList.every((item) => item.isChecked === 1) &&this.cartList.length !==0;
      },
      async set(isChecked) {
        try {
          //拿到所有商品的id列表
          const skuIdList = this.cartList.map((item) => item.skuId);
          await changeAllChecked(isChecked ? 1 : 0, skuIdList);
          //成功,重新请求最新的数据
          this.getShopCartList();
        } catch (e) {
          alert(e.message);
        }
      },
    },
    }
  }
</script>

<style lang="less" scoped>
  .cart {
    width: 1200px;
    margin: 0 auto;

    h4 {
      margin: 9px 0;
      font-size: 14px;
      line-height: 21px;
    }

    .cart-main {
      .cart-th {
        background: #f5f5f5;
        border: 1px solid #ddd;
        padding: 10px;
        overflow: hidden;

        &>div {
          float: left;
        }

        .cart-th1 {
          width: 25%;

          input {
            vertical-align: middle;
          }

          span {
            vertical-align: middle;
          }
        }

        .cart-th2 {
          width: 25%;
        }

        .cart-th3,
        .cart-th4,
        .cart-th5,
        .cart-th6 {
          width: 12.5%;

        }
      }

      .cart-body {
        margin: 15px 0;
        border: 1px solid #ddd;

        .cart-list {
          padding: 10px;
          border-bottom: 1px solid #ddd;
          overflow: hidden;

          &>li {
            float: left;
          }

          .cart-list-con1 {
            width: 4.1667%;
          }

          .cart-list-con2 {
            width: 25%;

            img {
              width: 82px;
              height: 82px;
              float: left;
            }

            .item-msg {
              float: left;
              width: 150px;
              margin: 0 10px;
              line-height: 18px;
            }
          }

          .cart-list-con3 {
            width: 20.8333%;

            .item-txt {
              text-align: center;
            }
          }

          .cart-list-con4 {
            width: 12.5%;

          }

          .cart-list-con5 {
            width: 12.5%;

            .mins {
              border: 1px solid #ddd;
              border-right: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }

            input {
              border: 1px solid #ddd;
              width: 40px;
              height: 33px;
              float: left;
              text-align: center;
              font-size: 14px;
            }

            .plus {
              border: 1px solid #ddd;
              border-left: 0;
              float: left;
              color: #666;
              width: 6px;
              text-align: center;
              padding: 8px;
            }
          }

          .cart-list-con6 {
            width: 12.5%;

            .sum {
              font-size: 16px;
            }
          }

          .cart-list-con7 {
            width: 12.5%;

            a {
              color: #666;
            }
          }
        }
      }
    }

    .cart-tool {
      overflow: hidden;
      border: 1px solid #ddd;

      .select-all {
        padding: 10px;
        overflow: hidden;
        float: left;

        span {
          vertical-align: middle;
        }

        input {
          vertical-align: middle;
        }
      }

      .option {
        padding: 10px;
        overflow: hidden;
        float: left;

        a {
          float: left;
          padding: 0 10px;
          color: #666;
        }
      }

      .money-box {
        float: right;

        .chosed {
          line-height: 26px;
          float: left;
          padding: 0 10px;
        }

        .sumprice {
          width: 200px;
          line-height: 22px;
          float: left;
          padding: 0 10px;

          .summoney {
            color: #c81623;
            font-size: 16px;
          }
        }

        .sumbtn {
          float: right;

          a {
            display: block;
            position: relative;
            width: 96px;
            height: 52px;
            line-height: 52px;
            color: #fff;
            text-align: center;
            font-size: 18px;
            font-family: "Microsoft YaHei";
            background: #e1251b;
            overflow: hidden;
          }
        }
      }
    }
  }
</style>